My 32' Jayco drives like a dream compared to a lot of complaints I've read on this forum about wandering Class Cs. I've driven my Class C 800 miles (SE Coastal Georgia to Southwest New Jersey) many times in one shot including dealing with Northern VA and DC traffic. That's about a 14 hour drive. And I'm not exhausted when I get there. In my 2008 year E450 the seats are pretty comfy. I am 5'11", 285lbs. I have plenty of leg room and head room. I'll be 41 in a couple weeks.
The only complaint I have is that drinks don't stay very cold for long in the cup holders, even with a Bubba Keg that usually keeps cold drinks cold for 12 hours. Oh another complaint I have is the dash AC is very, very cold. I prefer cold, but the dash AC is a little too cold even for me.
-Michael